VML Dating of Petroglyphs in the Mojave Desert, Western USA

Figure Caption: Optical microstratigraphies in rock varnish from pecked grooves of the "geometric line petroglyphs" in the Mojave Desert near China Lake, California. VML dating indicates an early-Holocene age (9400-11100 cal. years BP) for the making of these petroglyphs by prehistoric American Indians (Data source: Whitley, 2013).